Method of making printers&#39; rollers.



H. A. W. WOOD.

METHOD OF MAKING PRINTERS ROLLERS,

APPLICATION FILED MAY 4 15M 1,208,879, Patented D00. 19, 1916.

433354 h lls'a e I j i ocneys- State of New the temperature at the time METHOD OF MAKING PRINTERS Specification 01' Letters Patent.

YORK, N. Y., WOOD NEWSPAPER MACHINERY CORPORATION. OF NEW MESNE ASSIGNMENTS, TO YORK. N. Y., A CORPORA- sssronoa. BY

nonmns.

Patented 19,1916.

a umi aied m 4, 1914. semi no. 686,102.

To all whom it may concern:

Be it known that I, HENRY A. Wren Wooo, a. citizen of the United'States, residing at New York, in the county of New York and York, have invented t. new and useful Method of Making Printers Rollers, of which the following is a specification.

his invention relates to printers rollers made of roller composition, that is glue and glg cerin.

he princi a1 object of the invention is to. er'of this character which can rovide a ro v lie used for inking the ty e or cuts and which also will be capable of standing the high speeds at which presses are run at the present by whic the roller cannot burst when overheated and yet will have a smooth surface ofthe usual kind so that it can be used for the purpose of inkin the type or cuts.

Reference is to be had to the accompanying drawings in which- Figure 1 is an end view of a set of inking rolls to which this invention can be applied; Fig. 2 is a transverse sectional view ofa roller constructed in accordance with this invention; and Fig. 3 is a longitudinal central sectional v w of the same.

In Fig. 1 is shown a part of an inking apparatus involving means for applying'ink to a :plate cylinder 10. For this shownanl ink distributing cylin er 11 and a soft composition roller 12 contacting with it, Two form rollers 1 3 are shown contactalso an intermediate roll 14 is shown but it does not constitute art of this invention.- A

roller made accor ing to this invention is provided with a surface suitable for use as a form, or type inkin roll 13 and it can be used simply as an in distributing roller 12. These rollers 12 and 13 haveusually been made of roller composition, that is glue and glycerin, the proportions being varied to suit when they are As is well known such pliable, resilient and have a "face that is sufficiently tacky or stic adhere to it freel This type of printers roller, however, Iyfind to be useless at the high speeds at which certain'types of these presses are now run. This is ternal friction caused by the rapid contact constituting cially to provide a 'construcurpose is rollers must be I ky to cause the ink to' of the surface of the roller with the inking cylinders and type. This sets up a heat whio is sufficiently great to melt the glue. One we. of attempting to overcome this dif ficulty we been to change the chemical con tentof the rollers and another has been to place a canvas tube on the outside of the roller to hold the composition which fits snugly therein. This tube or jacket although a skin which, when the material of the roller melts, will revent the composition from flying off an smearing the parts of the machine with melted glue and glycerin and it obviously prevents the bursting of the roll as it is called. The woven fabric, however,

constltutes a comparatively rough surface hough it is suitable for use as the roller 12. In other words it is only an ink'distributin roller and not a form or type inkingro er. So far as I amjaware been made of glue and LbllC preferably eter slightly less than the diameter of the roller to be made. I place this tube in the mold centering it'therein so that it does not touch the cylindrical surface of the mold at any point and th any of the ordinary ways. One way of proceeding is to first cast a core with this canvas; tube on the outside, this core being slig tly smaller than the diameter of the fiu niold, then center this whole core with the tube on its outside in the final mold. Then a surface layer is cast by forcing position into the mold outside the This composition is homo neous with the composition inside the to space between the canvas tube and the walls of the mold and is united with the body of e and fills the.

a part of'the roller itself forms 1 and located near the surface.

v and it is cjapa rollers can be formed in chine with melted g ue an composition inside. When dry the completed, roller is withdrawn and used in the usual manner.

The result in any case is a roller suitable b for use as a form roller or es an ink istributing roller which is composed o homo cneous body of composition but has embe ded therein the tube of canvas concentric with the outside surface In this way all the strcngthsecured by the ordinary canvas jacket is provided and yet the surface is left in exactly the same condition as that of the ordinary composition form roller ble of use for that purpose. This construction does not detract in any way from the usefulness of the roller as an ink distributing roller, and in fact when this invention is used both these kinds of the same way, t nus eliminating the necessity of having two kinds of rollers and two Ways of making them.

A roller constructed in accordance with 25 this invention cannot burst when overheated and is therefore capable of being operated at all speeds. ltloreover, it prevents the composition flying off the roller when heated and smeerin the Karts of the me glycerin. Thus much time and labor usually required to of the rolleix clean up and start again after such accidents are save WAlthough I have illustrated my invention ne -applied to a particular type of inking mechanism and shown only a single speciiic embodiment of the invention, I am aware of the fact that the invention is ca able of general use in this art and that tiie specific form shown can be varied within reasonable limits without departing from the scope of the invention as expressed in the claims. Therefore, I do'not Wish to be limited in these respects, but

A method of making a printers roller which consists incentering a tube of flexible material in a cylindrical mold of larger diameter than the tube," keeping the tube out of. contact with the cylindrical inner surface of the mold, and molding the roller composition in said mold inside the tube and between the tube and mold to cover and surround said tube.

In testiinon whereof I have hereunto set :11 hand, in t 1e presence of two subscribing witnesses.

HENRY A WISE WOOD Witnesses I). LLOYD, V 

